Base plate



FIG. 1 is a right side perspective view of a base plate for a chair showing my new design;

FIG. 2 is a top view of the base plate of FIG. 1.

FIG. 3 is a bottom view of the base plate of FIG. 1.

FIG. 4 is a side view of the right side of the base plate of FIG. 1, the left side being a mirror image thereof.

FIG. 5 is a rear view of the base plate of FIG. 1; and,

FIG. 6 is a front view of the base plate of FIG. 1.

The broken lines shown herein are for illustrative purposes only and form no part of the claimed design. The bottom of the portion of the base plate for a chair forms no part of the claimed design. 

The ornamental design for a base plate for a chair, as shown and described. 